html,
body {
  height: 100%;
}

body {
  display: flex;
  align-items: center;
  padding-top: 40px;
  padding-bottom: 40px;
  background: linear-gradient(#43425d, #43425d, #6c626a);
  background-attachment: fixed;
}

.form-signin {
  width: 100%;
  max-width: 1000px;
  padding: 20px;
  margin: auto;
}

.form-signin .checkbox {
  font-weight: 400;
}

.form-signin .form-floating:focus-within {
  z-index: 2;
}

.form-signin input[type="email"] {
  margin-bottom: -1px;
  border-bottom-right-radius: 0;
  border-bottom-left-radius: 0;
}

.form-signin input[type="password"] {
  margin-bottom: 10px;
  border-top-left-radius: 0;
  border-top-right-radius: 0;
}
.form-signin input {
  font-size: 16px;
  outline: none;
}

/*ボタン*/
.btn {
  margin: 3px;
}

.button-go {
  background-color: #b89c81;
  color: #fff;

  transition: background-color 0.3s ease;
}

.button-go:hover {
  background-color: #997D51;
  color: #fff;
}

.button-back {
  background-color: #BCBCCB;
  color: #fff;

  transition: background-color 0.3s ease;
}

.button-back:hover {
  background-color: #A1A1B1;
  color: #fff;
}
.col-md-5--bd__inner {
  margin: 120px 0px 50px 55px;
}

/* setting */
.sp-block {
  display: none !important;
} 
@media screen and (max-width: 768px) {
  .sp-block {
    display: block !important;
  } 
}
.form-signin .card-body {
  margin: 25px 25px;
}

@media screen and (max-width: 768px) {
  .form-signin {
    max-width: 600px;
  }
  .form-signin .card-body {
    padding: 40px 20px;
    margin: 0 !important;
  }
  .checkbox {
    display: flex;
    align-items: center;
    justify-content: center;
  }
  .form-check-input {
    margin-right: 15px;
  }
  .form-check-label,
  .form-check-input {
    font-size: 14px !important;
  }
}